.container {
  position: relative;
  overflow: hidden;

  // 用于绘制签名的 canvas 占满全屏
  .signCanvas {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
  }

  // 把旋转内容的 canvas 藏起来
  .saveCanvas {
    position: absolute;
    top: -600px;
    left: 0;
    z-index: -1;
  }
}
